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2 years ago

15

Lester plays middle linebacker for dices football team. During one play, he made the following movements. First, he back-pedaled

in the southern direction for 2.6 meters

1 answer:

NikAS [45]2 years ago

4 0

Answer:

Explanation:

missing info .....

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CAN I HAVE BIOPHYSICS QUESTIONS AND QUIZZES

kherson [118]

Answer:

ok

Explanation:

post the question and we'll help :)

6 0

3 years ago

Read 2 more answers

A girl is sitting in a sled sliding horizontally along some snow (there is friction present).

Naddika [18.5K]

Answer:

159 N

Explanation:

The force of friction is a resistive force that acts against an object in motion (or on the verge of moving).

There are two types of force of friction:

Force of static friction: it occurs when the object is still at rest
Force of kinetic friction: it occurs when the object is sliding on a surface and it is in motion

In this problem, we are in the 2nd situation, so we want to calculate the force of kinetic friction.

This force is given by:

$F=\mu_k N$

where

$\mu_k$ is the coefficient of kinetic friction

N is the normal force exerted on the object

For the sled and the girl in this problem,

$\mu_K = 0.25$ is the coefficient of kinetic friction

N = 636 N is the normal force

So the force of friction is

$F=(0.25)(636)=159 N$

8 0

3 years ago

What does weighing less on the moon mean for astronauts on the moon?

AnnyKZ [126]

Answer:

Isaac Newton discovered that as an object's mass increases, the gravitational attraction of that object increases. Thus, the gravitational attraction on the Moon is much less than it is here on Earth, and a person weighs less on the Moon.

hope this helps!

5 0

2 years ago

A researcher wants to know the effect of lighting on snacking behavior. He knows that young adults normally eat an average of =

horrorfan [7]

Answer:

It does not impact snacking behavior.

Explanation:

The mean of the study was 18.7 grams, which is only 2.3 grams below the actual average grams of snacks that an adult would consume while at work, after revising this you could say that theres a significant reduction, but then the standard deviation is 9.1 this means that there are still adults that are eating more than 21 gram of snacks, so the test would result inconclusive.

8 0

4 years ago

(Another tomato/skyscraper problem.) You are looking out your window in a skyscraper, and again your window is at a height of 45

Ivan

Answer:

1027.2 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 32.2 ft/s

$s=ut+\frac{1}{2}at^2\\\Rightarrow u=\frac{s-\frac{1}{2}at^2}{t}\\\Rightarrow u=\frac{450-\frac{1}{2}\times 32.2\times 2^2}{2}\\\Rightarrow u=192.8\ ft/s$

$v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{192.8^2-0^2}{2\times 32.2}\\\Rightarrow s=577.20\ m$

The height the tomato would fall is 450+577.2 = 1027.2 m

6 0

4 years ago